I'm not even out of the gate. Followed instructions at,
https://wiki.dlang.org/Latest_LDC_binaries_for_Windows
- Head over to the GitHub release and download the latest x64/x86
.7z artifact at the bottom.
- Extract it somewhere.
- Use the executables bin\ldc2.exe and/or bin\ldmd2.exe.
Downloaded and extracted on windows 10 at c:\ldc\bin\...
Created a tiny d program called GC.d in same directory.
PS C:\LDC\bin> ldmd2 GC.d
Error: cannot find source code for runtime library file 'object.d'
ldc2 might not be correctly installed.
Please check your ldc2.conf configuration file.
Installation instructions can be found at
http://wiki.dlang.org/LDC.
import path[0] = C:\D\dmd2\windows\bin\..\include\d\ldc
import path[1] = C:\D\dmd2\windows\bin\..\include\d
I've looked at
http://wiki.dlang.org/LDC
and
https://wiki.dlang.org/Building_and_hacking_LDC_on_Windows_using_MSVC
and don't seem to see a possible solution. What am I doing wrong?
thanks.

I'm not even out of the gate. Followed instructions at,
https://wiki.dlang.org/Latest_LDC_binaries_for_Windows
- Head over to the GitHub release and download the latest x64/x86 .7z
artifact at the bottom.
- Extract it somewhere.
- Use the executables bin\ldc2.exe and/or bin\ldmd2.exe.
Downloaded and extracted on windows 10 at c:\ldc\bin\...
Created a tiny d program called GC.d in same directory.
PS C:\LDC\bin> ldmd2 GC.d
Error: cannot find source code for runtime library file 'object.d'
ldc2 might not be correctly installed.
Please check your ldc2.conf configuration file.
Installation instructions can be found at
http://wiki.dlang.org/LDC.
import path[0] = C:\D\dmd2\windows\bin\..\include\d\ldc
import path[1] = C:\D\dmd2\windows\bin\..\include\d
I've looked at
http://wiki.dlang.org/LDC
and
https://wiki.dlang.org/Building_and_hacking_LDC_on_Windows_using_MSVC
and don't seem to see a possible solution. What am I doing wrong?
thanks.

it finds `include` folder next to `bin` one and fails. You should
extract it too.

I'm not even out of the gate. Followed instructions at,
https://wiki.dlang.org/Latest_LDC_binaries_for_Windows
- Head over to the GitHub release and download the latest
x64/x86 .7z artifact at the bottom.
- Extract it somewhere.
- Use the executables bin\ldc2.exe and/or bin\ldmd2.exe.
Downloaded and extracted on windows 10 at c:\ldc\bin\...
Created a tiny d program called GC.d in same directory.
PS C:\LDC\bin> ldmd2 GC.d
Error: cannot find source code for runtime library file
'object.d'
ldc2 might not be correctly installed.
Please check your ldc2.conf configuration file.
Installation instructions can be found at
http://wiki.dlang.org/LDC.
import path[0] = C:\D\dmd2\windows\bin\..\include\d\ldc
import path[1] = C:\D\dmd2\windows\bin\..\include\d
I've looked at
http://wiki.dlang.org/LDC
and
https://wiki.dlang.org/Building_and_hacking_LDC_on_Windows_using_MSVC
and don't seem to see a possible solution. What am I doing
wrong?
thanks.

As I said on GitHub yesterday, you're better off with a normal
release package from
https://github.com/ldc-developers/ldc/releases.
Anyway, your import paths are clearly wrong (no C:\LDC in there).
I guess you extracted an LDC archive into C:\D\dmd2\windows and
have C:\D\dmd2\windows\bin in your PATH, so that ldmd2 ends up
invoking C:\D\dmd2\windows\bin\ldc2.exe or something like that. I
suggest running ldmd2 with `-v` to check the binary and config
file paths. The output should look similar to:
binary C:\LDC\ninja-ldc\bin\ldc2.exe
version 1.6.0git-366e2e4-dirty (DMD v2.076.1, LLVM
5.0.0git-64f4e71f1af)
config C:\LDC\ninja-ldc\bin\ldc2.conf (x86_64-pc-windows-msvc)
Otherwise, adapting your PATH environment variable should
definitely get you working.